Milk bottle



W. J. DAVIS.

MILK BOTTLE.

APPLICATION man AUM. 1917. nENEwED-Auc. 12.1921.

Patented Feb. 21; 1922.

NITED STATES Partnr ortica.

WILLIAM J. DAVIS, OF CHICAGO, ILLINOIS.

MILK BOTTLE. V

Specification of Letters Patent. Patented Feb. 21, 192.2.

Application led August 6, `1917, Serial No. 184,552. Renewed August 12, 1921. Serial No. 491,871,

To @ZZ whom, it may concern Be it known that LVILLTAM J; DAVIS, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have `invented certain -new and useful Improvements in Milk Bottles, of which the following is a full, clear, and exact specification. 1

My invention is concerned with milk bottles and caps of the general character shown in my application No. 162,273, filed April 16, 1917, and is designed to be an improvement on the bottle shown therein lin certain particulars.

In the bottle and cap of the aforesaid application, the release of the air caught in the cup-like cap is provided for by a slit in the cap, closed automatically as it is finally seated, whereas in my present application, the head of the bottle is so shaped as to provide for therelease of the air without the necessity of employing the slit in the cap.

My inventionis further concerned with a bottle having its head so shaped that the cap may be readily seated by machinery, even if it is expanded or stretched somewhat. To illustrate my invention, I annex hereto a sheet of drawin s, in which the same reference characters are used to designate identical parts in all the figures, of which- Fig. 1 is a central vertical longitudinal section 0f a bottle embodying my invention, showing the cap in place; v

Fig. 2 is a top plan view of the same; Fig, 3v is a plan view in section on the line 3--3 of Fig. 1;

Y Fig. f1 is a view similar to the upper part of Fig. 1, but showing how a spread cap may be automatically seated without difficulty; and f Fig. 5 is a side elevation showing a preferred form of cap.

The body a of the bottle may be of any preferred form, although I have shown it as preferably square in cross section, so thatthe bottles can be packed in cases with less loss of space than is customary with the ordinary round body. The bottoni is peculiar in that it is preferably provided at its center with the comparatively sharp protuberance c, which protuberance is connected with the sides by a continuous concaved surface CZ.

The head of the bottle is provided with the pouring flange 7L, which extends upward for a considerable distance above the sealing flange j, and said pouring'flange is provided with the substantially cylindrical sealing surface Zt, with which co-operates the interior sea-ling surface of the vertical flange or the cup-shaped cap Z. rlhis cap is preferably formed of some suitable fibrous material, such as paper or strawboard, preferably paraffined, and formed into the 4cup-shape shown. Theeedge m is preferably serrated as shown. The two flanges 7c and j are separated by the annular sealing channel or recess n, the inner wall of which is formed by the sealing surface Zr, while the outer wall is formed by the vertical portion of the sealing surface formed on the inner face of` the flange j. The width of the channel 'n is just sufficient sothat the cap Z can be forced in place and its vertical ange enter the annular channel a' and close the same air-tight. When the cap is thus forced and heldin place, itwill be obvious that the inner faces of the vertical walls of the cap and the sealing surface c will be in air-tight contact so that the bottle will be hermetically sealed. The upper portion of the flange-7c is curved or flared outward, as shown at 0, and this flare has several useful purposes. For instance, if the cap Zshould, through handling, become slightly separated at the bottom, when it is forced vertically downward by the capping machine, the flaring portion 0 will catch the spread bottom of the cap and force it inward to a position where it reaches the annular channel and enters the saine to seal the cap.

The bottle is completely filled with milk, and it will be obvious that when the cap Z is forced home, there is a tendency for the air in the cap to be compressed between the cap and the milk, and to permit the escape of the air up to the instant that the cap is finally seated, I provide the vertical channel g in the sealing face Zr, and extending from the top of the bottle down to a point close to the bottom of the channel a. At some suitable point in the sealing face of the flange j, I provide a similar channel r, which likewise extends down to a point near the bottom of the. channel a. W ith this arrangement, it will be obvious that as the cap descends, if its vertical inner face engages the sealing face 7:, the confined air can pass down the channel g and around the bottom of the channel n to the channel r, and upward through said channel, so that the confined air can escape up until the very last portion of the move1 ment ofthe cap Z, -when the bottom of the cap contacts with the bottom of the channel in, and finally seals the bottle. i

To permit the escape of any water which might otherwise stand in the Haring groove the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire tovsecure by Letters Patent of the United States, is: l. A bottle having an elongated, generally cylindrical exterior sealing surface just bevlow its mouth adapted to co-operate with a cap having an elon 'ated interior sealing surace, said bottle having a small, narrow groove extending from themouth downward in the face ot" the sealing surface to a point slightly above the lowest point reached by the cap when it is in place, said sealing sur 'low its mouth and a narrow annular recess in the neckforining the bottom of the sealing surface, and adapted to co-operate with a cap having an elongated interior sealing surface, said bottle having a small, narrow groove extending from the mouth downward in the face of the sealing surface to a point slightly above the lowest point reached by the cap when' it is in place, and a second small, narrow groove in,V the outerk vertical face ont the narrow annular recess likewise extending from the top of said face downward to a point slightly abovev the lowest point reached by the cap when it is in place, said sealing surfaces engaging each other directly and making air-tight contacts except for the grooves.

In witness whereof, I have hereunto set my hand and ailixed my seal, this 4th day of August, A. D. 1917. Y

' WILLIAM J. Davis. [L 5.] 

